A particle with rest mass `m_0` is moving with velocity c. what is the de-Broglie wavelength associated with it?

Options

A. `(h)/(m_0c)`
B. Zero
C. Infinity
D. `(m_0c)/(h)`

Answer

B

Explanation

`lamda = (h)/(mv)`, the relativistic variation of mass with speed is given by
`m=(m_0)/(sqrt(1-v^2/c^2))`
But when v = c , `m=(m_0)/(sqrt(1-1)) to oo`
as ` m to oo, lamda = (h)/(mv) to 0`